と
x <- data.frame(value = round(rt(20, 2), 2),
time = c("2012-09-03 00:00:00", "2012-09-03 00:30:00",
"2012-09-03 01:00:00", "2012-09-03 01:30:00",
"2012-09-03 02:00:00", "2012-09-03 02:30:00",
"2012-09-03 03:00:00", "2012-09-03 03:30:00",
"2012-09-03 04:00:00", "2012-09-03 04:30:00",
"2012-09-03 05:00:00", "2012-09-03 05:30:00",
"2012-09-03 06:00:00", "2012-09-03 06:30:00",
"2012-09-03 07:00:00", "2012-09-03 07:30:00",
"2012-09-03 08:00:00", "2012-09-03 08:30:00",
"2012-09-03 09:00:00", "2012-09-03 09:30:00"))
30分間隔の時系列形式に変換する方法はありますか?そのような:
00:00:00 00:30:00 01:00:00 01:30:00 02:00:00 02:30:00 ...
2012-09-03 0.31 -1.01 0.94 -0.75 -0.40 0.41
実際のところ、1日以上のデータがあり、その一部を示しているだけです。ありがとう!